Hindi translation: Add managing-secret-using-kubectl.md

[aryasoni98]

Description

This PR adds the Hindi translation of the "Managing Secrets using kubectl" documentation. The translation includes:

• Complete translation of the task guide for managing secrets using kubectl
• All code examples and commands preserved in their original form
• Technical terms maintained in English where appropriate
• Proper Hindi technical terminology used where applicable

This translation helps Hindi-speaking users understand how to manage secrets using the kubectl command-line tool.

Issue

Closes: #50292

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[aryasoni98]

@divya-mohan0209 Can you please review my PR? Open to any feedback or suggestions!

[divya-mohan0209]

Initial batch of reviews

[divya-mohan0209]

Secret needs to be transliterated.

[divya-mohan0209]

Can we translate escape here?